H3C Technologies H3C S3600 Series Switches - Manual (Page 466)

6-17
To do... Use the command… Remarks
Display the information about
IP and MAC multicast groups in
one or all VLANs
display igmp-snooping
group [ vlan vlan-id ]
Available in any view
Clear IGMP Snooping statistics
reset igmp-snooping
statistics
Available in user view
IGMP Snooping Configuration Examples
Configuring IGMP Snooping
Network requirements
To prevent multicast traffic from being flooded at Layer 2, enable IGMP snooping on Layer 2 switches.
z As shown in Figure 6-3 , Router A connects to a multicast source (Source) through Ethernet 1/0/2,
and to Switch A through Ethernet 1/0/1.
z Run PIM-DM and IGMP on Router A. Run IGMP snooping on Switch A. Router A acts as the IGMP
querier.
z The multicast source sends multicast data to the multicast group 224.1.1.1. Host A and Host B are
receivers of the multicast group 224.1.1.1.
Network diagram
Figure 6-3 Network diagram for IGMP Snooping configuration
Multicast packets
Source
Router A Switch A
Receiver
Receiver
Host B
Host A
Host C
1.1.1.1/24
Eth1/0/4
Eth1/0/2
Eth1/0/3
IGMP querier
Eth1/0/1
Eth1/0/1
10.1.1.1/24 Eth1/0/2
1.1.1.2/24
VLAN100
Configuration procedure
1) Configure the IP address of each interface
Configure an IP address and subnet mask for each interface as per Figure 6-3 . The detailed
configuration steps are omitted.
2) Configure Router A
# Enable IP multicast routing, enable PIM-DM on each interface, and enable IGMP on Ethernet 1/0/1.
system-view
[RouterA] multicast routing-enable